The process of replacing the coins, which have been in circulation for 33 years, began in March with the release of the new 12-sided version.

But if you're left with a stash of old coins after October 15, don't panic.

Most banks and building societies will continue to accept the old round pound after this date, as long as you are customer.

Customers can also pop into their local Post Office branch to deposit the old £1 into their bank account.

Jones said: “Over the next few weeks, everyone has a role to play. So, whether you are handling cash at the till or checking your change in the pub, check whether the pound in your hand is the new 12-sided version."

As a general rule of thumb, the rarer the coin the more valuable it is, and we’ve also published a £1 scarcity index, based on data from Checkcheker, so you can find out the value of each of the 24 £1 coin design.

Let’s work together and embrace the right ‘change’

In just four weeks the old round pound will roll off our high streets into the history books.

But it is estimated that there are still 360 million of these coins tucked away in piggy banks, purses and coat pockets across the country.

So, the clock is ticking.

From 15 October, these coins will lose their legal tender status and can no longer be spent in our shops and restaurants.

We can all play our part in this historic occasion. From those of you right on the frontline – pub landlords and shopkeepers working hard at till points across the country. To people simply doing the family shop, or nipping out for a pint down the local.

Over the next few weeks, everyone has a role to play and I encourage you all to get involved because it’s in all our interests to make this change as smooth and efficient as possible.

So, whether you are handling cash at the till point in Tesco, or checking your change at the bar in the local pub. Don’t forget to check whether the pound in your hand is the new 12-sided version, not the old round coin.

And if you do receive any old round pounds in your change, strike whilst the iron is hot - spend them, return them to your bank or donate them to charity before the October deadline. By doing so now, you will save yourself a trip to the bank or Post Office in the process.

So, in just one month’s time, all of us will be affected by this important change. From Aberdeen to Aberystwyth, Belfast to Berwick, Yeovil to York. Let’s work together to get Britain to embrace the right ‘change’.